EP1989350A1 - A washer - Google Patents

A washer

Info

Publication number
EP1989350A1
EP1989350A1 EP07712374A EP07712374A EP1989350A1 EP 1989350 A1 EP1989350 A1 EP 1989350A1 EP 07712374 A EP07712374 A EP 07712374A EP 07712374 A EP07712374 A EP 07712374A EP 1989350 A1 EP1989350 A1 EP 1989350A1
Authority
EP
European Patent Office
Prior art keywords
ozone
water
wash cycle
washer
ozone gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP07712374A
Other languages
German (de)
French (fr)
Other versions
EP1989350B1 (en
Inventor
Gokhan Ozgurel
Emre Ozturk
Deniz Seker
Emine Birci
Aylin Ersoy Akova
Zehra Ulger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Arcelik AS
Original Assignee
Arcelik AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Arcelik AS filed Critical Arcelik AS
Publication of EP1989350A1 publication Critical patent/EP1989350A1/en
Application granted granted Critical
Publication of EP1989350B1 publication Critical patent/EP1989350B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F35/00—Washing machines, apparatus, or methods not otherwise provided for
    • D06F35/005—Methods for washing, rinsing or spin-drying
    • D06F35/006—Methods for washing, rinsing or spin-drying for washing or rinsing only

Definitions

  • the present invention relates to a washer wherein in the treatment of the laundry ozonated washing is used.
  • the effective basic parameters are the mechanical movement, the amount of detergent, temperature and duration. Decreasing any one of these parameters results in the reduction of washing efficiency or the effect of one of the other parameters has to be increased in order to counteract this effect. For example, when the temperature goes down, the washing duration has to be increased.
  • the most critical of these parameters are the amount of detergent and temperature. When the amount of detergent used is reduced, the amount of chemical waste product discharged to the environment is decreased; it is then possible to shorten the washing duration with a lesser amount of water usage. However, reducing the amount of detergent results in profoundly lowering the washing efficiency and it is not possible to regain the same effect by changing the other parameters. Therefore, alternative washing methods have been developed in order to increase the washing efficiency.
  • One of the alternative washing methods is washing with ozone.
  • the ozone also has a significant whitening and soil removal effect besides its disinfection effect.
  • the laundry washed is provided to be whiter and disinfected by means of the ozone gas mixed in with the main water supply in the washing machines. Additionally, since ozone has a soil removal effect, the use of detergents and other washing agents are reduced and savings in energy consumption is realized since the washing is carried out in lower temperatures. With the reduction in detergent usage, washing process can be realized using a lesser amount of water.
  • German Patent Application no. DE3232057 the disinfection and/or sterilization effect of ozone is used during the washing process in washing machines and dishwashers. Furthermore, ozone gas is also used during rinsing process in this application.
  • the ozone gas is disintegrated with the movement of the drum and the effectiveness of ozone washing is reduced. Furthermore, even if the wash water is discharged after the ozone wash cycle in washing machines wherein ozone washing is carried out, the water amount absorbed by the laundry is quite high. So the water-ozone mixture absorbed by the laundry is conveyed to the water to be used in the detergent wash cycle. However in washings realized with water having a high concentration of ozone, the ozone gas results in deterioration of the detergent components, particularly the suriace-active substances and results in the ineffective use of detergent and therefore reduces the washing efficiency.
  • the objective of the present invention is to design a washer wherein ozone washing is carried out, enhancing the washing efficiency.
  • the washer designed to fulfill the objective of the present invention, explicated in the first claim and the respective claims thereof, is controlled by a washing program having an ozone wash and a detergent wash cycle.
  • the washing program parameters (temperature, duration of drum rotation or drum rotation speed etc.) are changed in order to realize an ozonated washing with an ozone gas-water mixture having a high concentration of ozone during the ozone wash cycle by mixing the ozone gas effectively with the water or to convert the ozone used in the water in the ozone wash cycle into oxygen in order to prevent ozone from damaging the detergent components to be used in the detergent wash cycle after the ozone wash cycle is completed.
  • the heater is operated to reach a certain temperature or the rotational speed or the run time ratio of the drum is increased in order to remove the ozone gas dissolved in the water without adversely affecting the detergent to be used in the detergent wash cycle.
  • the ozone- water mixture is heated by the heater.
  • the ozone gas having an unstable structure above a certain temperature is broken down to oxygen. Consequently the ozone gas is prevented from adversely affecting the chemical composition of the detergent and detergent wash is enabled to be carried out efficiently.
  • the mechanical movement of the water in the tub is escalated by increasing the rotational speed or run time ratio of the drum and thereby providing the ozone gas mixed into water to be decomposed into oxygen mechanically and to remove the ozone from the water.
  • the rotational speed of the drum is slowed down or the drum is stopped in order for the ozone to mix with water more effectively and to realize ozonated washing for a longer period of time with an ozone gas-water mixture having a high concentration of ozone.
  • Figure 1 - is the schematic view of a washer.
  • the washer (1) of the present invention comprises a tub (2), a drum (3) wherein the laundry to be washed, dried is emplaced, an ozone generator (4) providing to produce the ozone gas mixed into water delivered by the main water supply and a heater (5) that heats the water in the tub (2).
  • a washing program is implemented in the washer (1) comprised of first an ozone wash cycle wherein washing with ozone is realized and a detergent wash cycle that carries out washing with only detergent without the application of ozone that is followed by the rinsing and drying cycles.
  • the washing program parameters (temperature, duration of drum rotation or the drum rotational speed etc.) are changed in order to increase the time ozone gas stays in the water during the ozone wash cycle or to rapidly decrease the ozone gas amount in the water before starting the detergent wash cycle.
  • the washer (1) starts the washing program
  • the water received from the main water supply and the ozone gas produced by the ozone generator (4) are mixed.
  • the washing process is carried on for a predetermined time period, preferably for 20 minutes with the water-ozone gas mixture received into the washer (1).
  • ozone gas in continued to be delivered into the wash water.
  • the ozone generator (4) is turned off, cutting off the production of ozone.
  • the drum (3) rotation is changed such that it is slowed down or stopped in order for the ozone gas to mix in with water more effectively, to realize ozone washing for a longer period of time with an ozone gas-water mixture having a high concentration of ozone.
  • By slowing down drum (3) rotational speed the mechanical movement of the water in the tub (2) is slowed down and the composition of the ozone gas dissolved in the water is enabled to stay stable for a longer time without disintegrating. Consequently the conversion rate of water-dissolved ozone gas decomposing back into oxygen is slowed down by the effect of mechanical movement and the structural stability of ozone gas is preserved for a longer time thereby increasing the effect of ozone used in the ozone wash cycle.
  • the drum (3) is activated for a certain time period in order to shuffle the laundry, - preferably for 5 seconds in every 3 minutes.
  • the temperature of the water in the tub (2) is raised to a certain temperature by operating the heater (5) for a certain time period so that the ozone gas in the water is decomposed.
  • the heater (5) is again de-energized when the desired temperature is attained.
  • the ozone gas is destabilized by heating the water received into the washer (1) to approximately 5 °C above the temperature of entrance into the washer (1), although this temperature can vary with respect to the pH value of water received from the main supply.
  • the heater (5) is operated such that the temperature of the water in the tub (2) does not exceed the temperature of the washing program selected by the user.
  • the rotational speed or run time ratio of the drum (3) is increased, providing ozone gas to disintegrate into oxygen in a shorter time period.
  • ozone gas is delivered during the water intake as in the beginning. Rinsing is carried on with the water-ozone gas mixture for a predetermined time period. The hygienic effect is implemented with the application of ozone gas in the rinsing cycle.
  • the detergent washing is realized more effectively. Furthermore, by means of the present invention, the drum (3) movement is minimized in the washer (1) wherein ozone washing is carried out, increasing the ozone washing efficiency by keeping the stability of the ozone gas for a longer period of time.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)

Abstract

The washer (1) of the present invention comprises a washing program having ozone wash and detergent wash cycles, a tub (2), a drum (3) wherein the laundry to be washed, dried is emplaced, an ozone generator (4) providing to produce the ozone gas mixed into the water delivered by the main water supply and a heater (5) that heats the water in the tub (2).

Description

Description A WASHER
[0001] The present invention relates to a washer wherein in the treatment of the laundry ozonated washing is used.
[0002] In washers, particularly in laundry washing machines, the effective basic parameters are the mechanical movement, the amount of detergent, temperature and duration. Decreasing any one of these parameters results in the reduction of washing efficiency or the effect of one of the other parameters has to be increased in order to counteract this effect. For example, when the temperature goes down, the washing duration has to be increased. The most critical of these parameters are the amount of detergent and temperature. When the amount of detergent used is reduced, the amount of chemical waste product discharged to the environment is decreased; it is then possible to shorten the washing duration with a lesser amount of water usage. However, reducing the amount of detergent results in profoundly lowering the washing efficiency and it is not possible to regain the same effect by changing the other parameters. Therefore, alternative washing methods have been developed in order to increase the washing efficiency. One of the alternative washing methods is washing with ozone.
[0003] The ozone also has a significant whitening and soil removal effect besides its disinfection effect. The laundry washed is provided to be whiter and disinfected by means of the ozone gas mixed in with the main water supply in the washing machines. Additionally, since ozone has a soil removal effect, the use of detergents and other washing agents are reduced and savings in energy consumption is realized since the washing is carried out in lower temperatures. With the reduction in detergent usage, washing process can be realized using a lesser amount of water.
[0004] In the state of the art German Patent Application no. DE3232057 the disinfection and/or sterilization effect of ozone is used during the washing process in washing machines and dishwashers. Furthermore, ozone gas is also used during rinsing process in this application.
[0005] In the state of the art United States of America Patent Application no. US5806120, the explication is given for an ozone generator that provides ozone by ionizing the air and a laundry machine wherein this ozone generator is used.
[0006] In the state of the art Canadian Patent Application no. CA2310864, the description is given while the water is received into the washing machine the water passes through a venturi-type differential pressure injector for injecting ozone gas created by the ozone generator into the water.
[0007] During washing with ozone, the ozone gas is disintegrated with the movement of the drum and the effectiveness of ozone washing is reduced. Furthermore, even if the wash water is discharged after the ozone wash cycle in washing machines wherein ozone washing is carried out, the water amount absorbed by the laundry is quite high. So the water-ozone mixture absorbed by the laundry is conveyed to the water to be used in the detergent wash cycle. However in washings realized with water having a high concentration of ozone, the ozone gas results in deterioration of the detergent components, particularly the suriace-active substances and results in the ineffective use of detergent and therefore reduces the washing efficiency.
[0008] The objective of the present invention is to design a washer wherein ozone washing is carried out, enhancing the washing efficiency.
[0009] The washer designed to fulfill the objective of the present invention, explicated in the first claim and the respective claims thereof, is controlled by a washing program having an ozone wash and a detergent wash cycle. The washing program parameters (temperature, duration of drum rotation or drum rotation speed etc.) are changed in order to realize an ozonated washing with an ozone gas-water mixture having a high concentration of ozone during the ozone wash cycle by mixing the ozone gas effectively with the water or to convert the ozone used in the water in the ozone wash cycle into oxygen in order to prevent ozone from damaging the detergent components to be used in the detergent wash cycle after the ozone wash cycle is completed.
[0010] After the ozone wash cycle is completed, the heater is operated to reach a certain temperature or the rotational speed or the run time ratio of the drum is increased in order to remove the ozone gas dissolved in the water without adversely affecting the detergent to be used in the detergent wash cycle.
[0011] In an embodiment of the present invention, at the end of the ozone wash cycle, before the detergent wash cycle begins, the ozone- water mixture is heated by the heater. The ozone gas having an unstable structure above a certain temperature is broken down to oxygen. Consequently the ozone gas is prevented from adversely affecting the chemical composition of the detergent and detergent wash is enabled to be carried out efficiently.
[0012] In another embodiment of the present invention, before starting the detergent wash cycle, the mechanical movement of the water in the tub is escalated by increasing the rotational speed or run time ratio of the drum and thereby providing the ozone gas mixed into water to be decomposed into oxygen mechanically and to remove the ozone from the water.
[0013] In yet another embodiment of the present invention, during the ozone wash cycle, the rotational speed of the drum is slowed down or the drum is stopped in order for the ozone to mix with water more effectively and to realize ozonated washing for a longer period of time with an ozone gas-water mixture having a high concentration of ozone.
[0014] The washer designed to fulfill the objective of the present invention is illustrated in the attached figures, where:
[0015] Figure 1 - is the schematic view of a washer.
[0016] The elements illustrated in the figures are numbered as follows:
1. Washer
2. Tub
3. Drum
4. Ozone generator
5. Heater
[0017] The washer (1) of the present invention comprises a tub (2), a drum (3) wherein the laundry to be washed, dried is emplaced, an ozone generator (4) providing to produce the ozone gas mixed into water delivered by the main water supply and a heater (5) that heats the water in the tub (2).
[0018] A washing program is implemented in the washer (1) comprised of first an ozone wash cycle wherein washing with ozone is realized and a detergent wash cycle that carries out washing with only detergent without the application of ozone that is followed by the rinsing and drying cycles.
[0019] In the washer (1), the washing program parameters (temperature, duration of drum rotation or the drum rotational speed etc.) are changed in order to increase the time ozone gas stays in the water during the ozone wash cycle or to rapidly decrease the ozone gas amount in the water before starting the detergent wash cycle.
[0020] When the washer (1) starts the washing program, the water received from the main water supply and the ozone gas produced by the ozone generator (4) are mixed. The washing process is carried on for a predetermined time period, preferably for 20 minutes with the water-ozone gas mixture received into the washer (1). During the ozone wash cycle, ozone gas in continued to be delivered into the wash water. When the ozone wash cycle is completed, the ozone generator (4) is turned off, cutting off the production of ozone. During the ozone wash cycle, the drum (3) rotation is changed such that it is slowed down or stopped in order for the ozone gas to mix in with water more effectively, to realize ozone washing for a longer period of time with an ozone gas-water mixture having a high concentration of ozone. By slowing down drum (3) rotational speed, the mechanical movement of the water in the tub (2) is slowed down and the composition of the ozone gas dissolved in the water is enabled to stay stable for a longer time without disintegrating. Consequently the conversion rate of water-dissolved ozone gas decomposing back into oxygen is slowed down by the effect of mechanical movement and the structural stability of ozone gas is preserved for a longer time thereby increasing the effect of ozone used in the ozone wash cycle. The drum (3) is activated for a certain time period in order to shuffle the laundry, - preferably for 5 seconds in every 3 minutes.
[0021] After the ozone wash cycle is completed, before starting the detergent wash cycle, without mixing in the ozone gas, the temperature of the water in the tub (2) is raised to a certain temperature by operating the heater (5) for a certain time period so that the ozone gas in the water is decomposed. The heater (5) is again de-energized when the desired temperature is attained.
[0022] Consequently, the molecular structure of the ozone gas mixed into water during the ozone wash cycle is decomposed with heat, converting into oxygen and an efficient washing process is realized without deteriorating the composition of the detergent.
[0023] In the preferred embodiment of the present invention, the ozone gas is destabilized by heating the water received into the washer (1) to approximately 5 °C above the temperature of entrance into the washer (1), although this temperature can vary with respect to the pH value of water received from the main supply.
[0024] In another embodiment of the present invention, the heater (5) is operated such that the temperature of the water in the tub (2) does not exceed the temperature of the washing program selected by the user.
[0025] In another embodiment of the present invention, after completing the ozone wash cycle, before starting the detergent wash cycle, the rotational speed or run time ratio of the drum (3) is increased, providing ozone gas to disintegrate into oxygen in a shorter time period.
[0026] In the rinsing cycle, ozone gas is delivered during the water intake as in the beginning. Rinsing is carried on with the water-ozone gas mixture for a predetermined time period. The hygienic effect is implemented with the application of ozone gas in the rinsing cycle.
[0027] By means of the present invention, in the washer (1) wherein ozonated washing is carried out, the detergent washing is realized more effectively. Furthermore, by means of the present invention, the drum (3) movement is minimized in the washer (1) wherein ozone washing is carried out, increasing the ozone washing efficiency by keeping the stability of the ozone gas for a longer period of time.

Claims

Claims
[0001] A washer (1) comprising a tub (2), a drum (3) wherein the laundry to be washed, dried is emplaced, an ozone generator (4) providing to produce the ozone gas mixed into the water delivered by the main water supply and a heater (5) that heats the water in the tub (2) and characterized by changing the washing program parameters in order to increase the duration the ozone gas stays in the water during the ozone wash cycle or to rapidly decrease the ozone gas amount in the water before starting the detergent wash cycle following the ozone wash cycle.
[0002] A washer (1) as in Claim 1, characterized by slowing down or stopping the rotation of the drum (3) so that the ozone gas mixes with water more effectively during the ozone wash cycle in order to realize ozone washing for a longer period of time with an ozone gas-water mixture having a high concentration of ozone.
[0003] A washer (1) as in Claim 1, characterized by a heater (5) that is operated for a certain time period after the ozone wash cycle is completed to increase the temperature of the water in the tub (2) before starting the detergent wash cycle, providing the ozone gas in the water to be decomposed.
[0004] A washer (1) as in Claim 2 or 3, characterized by a heater (5) that is operated until the temperature of the water goes up to approximately 5°C over its intake temperature.
[0005] A washer (1) as in Claim 2 or 4, characterized by a heater (5) that is operated such that the temperature of the water in the tub (2) does not exceed the temperature of the washing program selected by the user.
[0006] A washer (1) as in Claim 1, characterized by a drum (3), of which the rotational speed or the run rate is increased before starting the detergent wash cycle.
[0007] A washer (1) as in Claim 1, characterized by a drum (3), the rotational speed of which is slowed down or stopped during the ozone wash cycle so that the ozone gas mixes with water more effectively in order to realize ozone washing for a longer period of time with an ozone gas-water mixture having a high concentration of ozone.
EP07712374A 2006-03-01 2007-02-28 A washer Active EP1989350B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR200600936 2006-03-01
PCT/EP2007/051886 WO2007099113A1 (en) 2006-03-01 2007-02-28 A washer

Publications (2)

Publication Number Publication Date
EP1989350A1 true EP1989350A1 (en) 2008-11-12
EP1989350B1 EP1989350B1 (en) 2011-06-01

Family

ID=38050879

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07712374A Active EP1989350B1 (en) 2006-03-01 2007-02-28 A washer

Country Status (5)

Country Link
EP (1) EP1989350B1 (en)
CN (1) CN101395319A (en)
AT (1) ATE511566T1 (en)
ES (1) ES2365054T3 (en)
WO (1) WO2007099113A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008024322A1 (en) * 2008-05-20 2009-11-26 BSH Bosch und Siemens Hausgeräte GmbH Dishwasher with ozone generator and method for improving the hygiene in a dishwasher
ITTO20100825A1 (en) * 2010-10-07 2012-04-08 Indesit Co Spa DISHWASHER MACHINE WITH CLEANING CYCLES AND METHOD OF SANITATION OF THIS MACHINE.
CN106149290A (en) * 2015-04-28 2016-11-23 青岛海尔滚筒洗衣机有限公司 A kind of ozone sterilizing washing machine and method
JP7343854B2 (en) * 2018-12-27 2023-09-13 青島海爾洗衣机有限公司 washing machine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3232057A1 (en) * 1982-08-28 1984-03-01 Rudolf 3501 Schauenburg Gesslauer Machine for cleaning washing, crockery or the like
US5806120A (en) * 1997-05-30 1998-09-15 Envirocleanse Systems, Inc. Ozonated laundry system
US7141124B2 (en) * 2003-05-08 2006-11-28 J. Michael Rusciolelli Processes and compositions for use in garment restoration
GB2414743B (en) * 2004-06-04 2009-07-22 Jla Ltd A washing machine and method of washing

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007099113A1 *

Also Published As

Publication number Publication date
EP1989350B1 (en) 2011-06-01
WO2007099113A1 (en) 2007-09-07
ES2365054T3 (en) 2011-09-21
ATE511566T1 (en) 2011-06-15
CN101395319A (en) 2009-03-25

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